Guess this could use it's own thread now. Anyone know a good tutorial for minecarts? I want to have a system that somehow powers itself so that I can have a minecart highway. I can't find that one where the guy had a system where you could step on the panel and call a cart, could someone link it?

Well if you want a good minecrart system, you'll want to make boosters.

(you know what a booster is?)

Well if you do, Then use them, they are WAY better than coal powered ones.

Edited:

Also check out Bob's Minecraft Tutorial 1: Minecart Boosters
It's really good at telling you how to make them.

Boosters are not necessarily better than powered carts. Boosters are good if you want to send people vast distances at high speed, but if you want to send storage carts (as you would in a lengthy mineshaft with an extended mining expedition) then coal-powered carts are your best bet, assuming you have no steep slopes. Boosters DO NOT work very well with "empty" (storage) carts at all.